Rich in antioxidants, the small black berries of the Elder tree have been used in traditional medicine for centuries due to their health-boosting properties. Some studies have shown that elderberries can strengthen the immune system, thanks to their antibacterial and anti-infectious abilities. They may even reduce the pain associated with autoimmune diseases, and the speed that certain cancers develop. Antioxidants found in elderberries can help regulate insulin and glucose levels, which supports digestion and aids the management of diabetes. Elderberries have also been used to help with weight loss, allergies such as hay fever, and as a laxative.